摘要：
测定纯CO2水合物和干密度为1.40、1.50、1.65 g·cm-3粉土中CO2水合物的稳定性条件。通过实验数据的对比分析，表明了粉土孔隙效应对CO2水合物稳定性条件具有重要影响，较于纯水合物，粉土中水合物稳定性压力更高、温度更低。另外，比较了不同初始分解温度下1.50 g·cm-3粉土中CO2水合物的稳定性条件，证明了水合物初始分解温度会对沉积物中水合物的稳定性条件测定产生影响。最后，基于修正的van der Waals-Platteeuw
关键词:
粉土；
Abstract:
Evaluation of stability condition is an important issue in the study of gas hydrate.In this study, the stability conditions for the bulk CO2 hydrate and the CO2 hydrate in silts with dry densities 1.40 g·cm-3, 1.50 g·cm-3 and 1.65 g·cm-3, respectively, are measured and compared.It is shown that the pore effect of silts affects the stability of CO2 hydrate.Compared with the bulk hydrate, the hydrate in the silts has higher equilibrium pressure and lower equilibrium temperature.In addition, the initial dissociation temperature of pore hydrate may affect the stability of hydrate in the silts.Based on the modified van der Waals-Platteeuw model, the stability conditions of gas hydrate in the silt with density 1.65 g·cm-3 are analyzed.It is found that the effect of capillarity on the stability varies.As the hydrate in the silt dissociates, the capillary effect diminishes.
Key words: 粉土；FONT-SIZE: 10.5pt, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体, mso-hansi-font-family: 宋体, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast" lang=EN-US>CO2FONT-SIZE: 10.5pt, mso-ascii-font-family: Calibri, mso-bidi-font-family: 宋体, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-bidi-font-size: 11.0pt, mso-ascii-theme-font: minor-latin, mso-fareast-theme-font: minor-fareast">水合物；毛细效应；稳定性条件
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